Module: Flow Tracing
(c) 2001 by O.Conrad
Menu: Terrain Analysis > Hydrology > Catchment Area
Description
Flow tracing algorithms for calculations of flow accumulation and related parameters. These algorithms trace the flow of each cell in a DEM separately until it finally leaves the DEM or ends in a sink.
References:
Rho 8 (this implementation adopted the original algorithm only for the flow routing and will give quite different results):
- Fairfield, J. / Leymarie, P. (1991):
'Drainage networks from grid digital elevation models',
Water Resources Research, 27:709-717
Kinematic Routing Algorithm:
- Lea, N.L. (1992):
'An aspect driven kinematic routing algorithm',
in: Parsons, A.J., Abrahams, A.D. (Eds.), 'Overland Flow: hydraulics and erosion mechanics', London, 147-175
DEMON:
- Costa-Cabral, M. / Burges, S.J. (1994):
'Digital Elevation Model Networks (DEMON): a model of flow over hillslopes for computation of contributing and dispersal areas',
Water Resources Research, 30:1681-1692
Parameters
Name | Type | Identifier | Description | Constraints |
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Input |
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Elevation | Grid (input) | ELEVATION | | |
Sink Routes (*) | Grid (optional input) | SINKROUTE | | |
Weight (*) | Grid (optional input) | WEIGHT | | |
Output |
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Catchment Area | Grid (output) | CAREA | | |
Catchment Height (*) | Grid (optional output) | CHEIGHT | | |
Catchment Slope (*) | Grid (optional output) | CSLOPE | | |
Options |
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Step | Integer | STEP | | Minimum: 1.000000 |
Method | Choice | Method | | Available Choices: [0] Rho 8 [1] Kinematic Routing Algorithm [2] DEMON |
DEMON - Min. DQV | Floating point | MINDQV | DEMON - Minium Drainage Quota Volume (DQV) for traced flow tubes | Value Range: 0.000000 - 1.000000 |
Flow Correction | Boolean | CORRECT | | |
(*) optional